Oil-burner.



H. W. HOOVER.

OIL BURNER.

APPLICATION man MAY s. 1913. nENEwEn Aus. 24. 191s. 1,21 8,942. Patented Mar. 13, 1917. 2 SHEETS-SHEET 2` FXL?, f o -T-T-TT'T-T WJTNESSLS /NVENTOR f4-W o 0 y@ i:

UNITED sTATEs PATENT oEEiJoE.

HERBERT W. noovEE, or BAYONNE, NEW JERSEY. Y

01E-BURNER'.

Application filed May 9, 1913, Serial No. 766,584. Renewed August 24, 1916.

To all lwhom z''may'coh'cem:

Be it known that I, -HEREERT W.' HOOVER, a citizen of the United States, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Oil-Burners, of which the following is a specification.

This invention relates to burners for liquid fuel, and has for its objectV to improve the construction of such devices particularly with reference to increasing the efficiency thereof in mixing the fuel with air. It is a purpose to provideY in one element means to both admit air and give a r"o tary or whirling movement to the mixture. The importance of admitting the proper proportion of air in all furnaces is generally appreciated, and it is an important attainment of the invention that it permits the satisfactory regulation of this element of combustion with great ease and accuracy. It is an aim of the invention to provide a simple construction of burner including a simple means for admitting air in large volume, includingmeans of simple construction'on the burner for regulating the quantity of air without aecting the fuel feed, yet conveniently located for simultaneous adjustment to correspond with any changes which may be made in the fuel feed.

Itis fan important object to construct a burner with a small numberl of parts yet including a readily removable tip, and an efficient fuel strainer adapted to be readily cleaned or removed.

Additional objects'V and advantages will appear, some of which will be apparent from the following description and from the drawings, in which,

Figure 1 is a vertical longitudinal sectional view of my device in operative position;

Fig. 2 is a top view of the burner,

Fig. 3 is an inner end view thereof,

Fig. 4 is a transverse section showing the strainer,

Fig. 5 is a detail inner end view of the burner4 detached. y

There is illustrated a furnace including the ire-box 10, including the front wall 11, through which is formed a port 12, conforming to the shape of a hood to be described and in which there is mounted the burner 13, the inner end of which may project slightly into the iirebox, but which, as

Specification of Letters Patent.

' shown, vof the yand cylindrical.

Patented Mal-.13, 1917.

serial No.' 116,702.

is about flush with the inner surface wall 11, being supported in the port many suitable manner. The burner comprises a body portion ldof cylindrical form, being somewhat enlarged, as at 15, at its outer end, while the inner part is elongated On opposite sides ofthe enlargement there arel formed lateral ears 17 apertured to serve as guides for air control rods 18 slidably engaged therethrough. The outer end of the burner is planed and has fitted therein a plug 30 serving as a closure and carrying an axial bolt 19 threaded and having engaged thereon the lmurledthumb nut 20 having a peripheral groove around its innerpart in which there is fitted a segment 21 lugs 22 in which there are engaged suitable headed screws holding the apertured outer ends of the rodsv 18 which receive the screws therethrough. The inner ends of the rods are secured in f the apertured planiform base portion 23 of la'hoo'd having the outwardly divergent sides 25 the outer 'edges of which conform tothe shapeof the port 12. The hood at the outer limit of its.

movement is adapted to -it within the port for closure thereof againstV entrance of air except through the apertured base 23. The divergent portion of the hood is formed to 'provide spiral ribs or vanes 26 by which all al'r entering is given a whirling mot-ion serving to produce a thorough diffusion of the vapors from the burnerthroughout the firebox. The small apertures through the head of the hood supply jets of air for engaging whirling sprays of fuel which leave the end of the burner. l

having projecting `The burner body, which may' be. cast, is i 'provided with -an axial bore 27 f extending for 'the greater part of its length, terminating at its inner end in a reduced duct 28 opening through the end of the casting, a conical enlargement of the duct being formed, opening on'l the innerend face of the casting. At the outer end of the casting, the bore is enlarged to form a strainer chamber 29, the outer en'd of which is threaded and closed by the plug 30 adapted for removal to allow renewal of the strainer 31 which is closely confined between the plug and the shoulderr 32 at the inner end of the chamber 29. The strainer comprises a foraminous cylinder 33 around which there is closely wound a strip of ne mesh wire screen 34. The cylinder serves to hold the screen 34 in proper shape for close confinement between the plug 30 and shoulder 32 without being forced into the bore 2'?. strainer is slightly Vsmaller than the chamber 29, so that there is an annular space around the strainer. Opening from one side of the chamber there is a suitably threaded bore 35 adapted to receive a Jfuel supply pipe, and directly opposite a smaller coaxial threaded opening 36 leads from the chamber through the side of the burner body, being intended for engagement with pipe connected with suitable means for cleansing the strainer by steam or other l'luid, not illustrated.

The inner end of the burner body is threaded as at 37, and engaged thereover is the cap or atomizing nozzle 3S, having a central conical projection 39, litting snugly in the conical enlargement or the duct 2S. The end of the burner is planii'iorm and with the conical extension 39 oi the cap seated snugly in the end of the duct 28 the top oi the cap is engaged closely against the end of the burner casting. A number of circular wells Ll() are formed in the inner side of the cap spaced around the projection 39, terminating in conical portions ll from the vertices of which extend very small discharge openings /lQ through the cap. r1fhe vertices of the wells are located very close to the outer surface of the cap, so that the openings 42 have no great length. Formed in the sides of the conical extension 39 there are spiral grooves opening on the inner end of the extension and terminating at its base between the wells 40, in an annular channel C, whose perimeter cuts into the wells l0 slightly, whereby fuel may be led from the duct 28 to the wells with the eliect of rapidly rotating the fuel in the wells and at the instant of discharge, the advantage of which in atoi'nizing the liquid will be appreciated. The eiiect will be greatly increased when used in connection with means for heating the fuel supply under pressure, for which my invention is especially adapted.

ln order to adapt the operation of the hood to cut oilp air entirely, il' desired, the supporting spider 45 may be provided with a flange 46 so disposed as to close the apertures in the base 23 of the hood when the latter is at the outer limit of movement, the device being so illustrated. rlhe hood is adapted to be stamped integrally from sheet metal, the ribs or vanes thereof being pressed inwardly in the form of corrugations, one side of each of which is substantially lat and disposed at an abrupt angle to an intersecting circle concentric with the hood. The ribs may of course be made separately and fastened to the hood but the particular Jform shown is low in cost and ellicient. `The inner faces of the hood are covered with asbestos sheeting 24 properly secured. This hood will give proper rotary movement to air entering through its head, as well as that passing in therearound through the port 12, which occurs when the hood is moved inwardly beyond the wall ll. With the edges of the hood within the port, air enters through the base 23, and is cut 0E' from entry around the sides or' the hood.

In use, suitable fuel connections being made with the burner, and means provided for heating the fuel to the desired extent closely adjacent the burner, and if desired, a blower attachment provided for supplying air to the port l2, l subject the Afuel to a pressure or approximately one hundred pounds by forcing it toward the nozzle with a suitable pmnp, and operate the heating device to bring the fuel to a temperature approximately twenty degrees Fahrenheit below the flash-point of the oil, and it is found that absolute combustion occurs with admission of the proper quantity of air. lt has also been demonstrated that the flame may be regulated with this device without loss of eiliciency from its maximum volume to the vanishing point.

What is claimed is:

l. A burner comprising a body having a nozzle at its inner end, a circumscribing air agita-ting hood mounted slidably on the body rearwardly oi the nozzle and including an apertured base portion adjacent the burner body, a flange on the body arranged to abut and close the aperture in the hood at one limit of its movement, and means to reciprocate the hood on the body.

2. In a burner of the class described, a burner body having a nozzle at its inner end, a circumscribing air agitating hood longitudinally slidable on the body rearwardly of the nozzle, air inlet means arranged, constructed, and adapted to be closed by the hood at one limit o1 its movement, guide lugs on two sides of the body, rods slidable therein and connected to the hood, a coaxial threaded member at the outer end of the burner, a nut engaged thereon having a peripheral groove, and a collar in the groove connected to the rods.

3. A burner comprising a body having anelongated forward portion, a nozzle at the extremity of the elongated portion, an air duct surrounding the said elongated portion of the body, an air agitating hood surrounding and longitudinally reciprocable on the elongated portion of the body and adapted to close said air duct at a stage of its movement, and means on the burner to reciprocate the hood.

4. A burner comprising a body having an elongated inner portion, a nozzle at the extremity thereof, a hood longitudinally reciprocable thereon, adapted for agitation of air passing therethrough and therearound,

air inlet means constructed and adapted to be controlled by the position of the hood, a fuel passage formed through the body, a Closure member engaged in the outer end of the passage, including an axial threaded member projected outwardly thereof, a circumferentially grooved nut engaged thereon, a collar in the groove, rods attached to the collar on each side of the burner and connesses. Y

HERBERT W. HGOVER. Witnesses:

ANTHONY R. MASSARELLI, GEORGE E. GRIsWoLD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

